package com.yjx.managedemo.util;


import java.security.MessageDigest;

/**
 * @ Author:  OlderHard
 * @ CreateTime: 2025-01-05
 * @ Description: 密码加密工具
 * @ Version: 1.0
 */

public class MD5Util {
    //加盐
    public static final String SALT = "situ";

    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));

        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    /**
     * 返回大写MD5
     *
     * @param origin
     * @param charsetname
     * @return
     */
    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname)) {
                resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
            } else {
                resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
            }
        } catch (Exception exception) {
        }
        return resultString.toUpperCase();
    }

    public static String MD5Encode(String origin) {
        return MD5Encode(origin, "utf-8");
    }


    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};

//    public static void main(String[] args) {
//        System.out.println(MD5Encode("123456"));
//        System.out.println(MD5Encode("123456"));
//        //E10ADC3949BA59ABBE56E057F20F883E
//        //E10ADC3949BA59ABBE56E057F20F883E
//    }

}